εἶτα ὁ γνώμων μοί πως ἀνίσταται → then my tool suddenly stood up
P. χάσμη, ἡ, Ar. χάσμημα, τό.
Ar. and P. χάσκειν, χασμᾶσθαι.
Met., of an opening: P. and V. διίστασθαι, P. ῥήγνυσθαι.